8 oz. can of sliced mushrooms
2 tablespoons melted butter or margarine
1 teaspoon salt
1/2 teaspoon garlic powder
1/8 teaspoon pepper
3-4 chicken breasts, cooked, skinned, de-boned, and shredded
1 can cream of celery soup
8 oz. sour cream
1 (8-oz.) package of spaghetti noodles
1/2 cup (or more!) Parmesan cheese